Colchester is a town in Chittenden county, Vermont. It was formed in 1763 in N.H. from the following county/ies: Addison. The probate and court district for Colchester is Chittenden. For more information, contact the town at 835 Blakely Rd., P.O. Box 55, Colchester 05446. On the attached map, Colchester is shown as 4 in Chittenden county.